.middle > div {
    border: 1px solid gray;
}

.online > div:nth-child(1) > div:nth-child(1) {
    display: flex;
    justify-content: center;
}

.online > div:nth-child(1) {
    text-align: center;
}

.online > div:nth-child(1) > div:nth-child(1) > div {
    display: flex;
    align-items: center;
}

.online > div:nth-child(1) > div:nth-child(1) > div > div:nth-child(1) {
    font-size: 35px;
    color: #ff9e60;
}

.online > div:nth-child(1) > div:nth-child(1) > div > div:nth-child(2) {
    font-size: 25px;
    color: #b1a2ff;
}

/*-------留言内容---------*/
.online > div:nth-child(2) {
    display: flex;
    justify-content: center;
    margin: 30px 0;
}

/*.online > div:nth-child(2) > div {*/
/*    border: 1px solid red;*/
/*    width: 600px;*/
/*}*/

/*.online > div:nth-child(2) > div > div:nth-child(1) > div > div:nth-child(1) {*/
/*    line-height: 30px;*/
/*}*/

/*.online > div:nth-child(2) > div > div:nth-child(1) > div > div:nth-child(2) {*/
/*    background-color: #b1a2ff;*/
/*    border: 1px dashed gray;*/
/*    line-height: 30px;*/
/*    height: 30px;*/
/*    padding: 0 10px;*/
/*}*/

/*.online > div:nth-child(2) > div > div:nth-child(1) > div:nth-child(3) > div:nth-child(2) {*/
/*    height: 100px;*/
/*    line-height: 20px;*/

/*}*/
form {
    /*border: 1px solid red;*/
    width: 600px;
}

input[requir] {
    width: 592px;
    background-color: rgb(238, 238, 238);
    border: 1px dashed gray;
    line-height: 30px;
    height: 30px;
    /*padding: 0 10px;*/
}

textarea {
    width: 594px;
    height: 100px;
    line-height: 20px;
}

form > div > div > div:nth-child(1) {
    line-height: 30px;
}

form > div:nth-child(2) {
    display: flex;
    justify-content: center;
}

/*属性选择器*/
input[type=submit] {
    padding: 5px 40px;
    margin: 30px;
    background-color: #ff9e60;
    border: none;
    color: white;
    border-radius: 0 40px 40px 0;
    box-shadow: 2px 5px 10px red;
    cursor: pointer;
}
